Main.java Source code

Introduction

Here is the source code for Main.java

Source

//package com.java2s;
/*
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership.  The ASF licenses this file
 * to you under the Apache License, Version 2.0 (the
 * "License"); you may not use this file except in compliance
 * with the License.  You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing,
 * software distributed under the License is distributed on an
 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
 * KIND, either express or implied.  See the License for the
 * specific language governing permissions and limitations
 * under the License.
 */

import java.security.MessageDigest;
import java.security.NoSuchAlgorithmException;

public class Main {
    private static final char[] HEX_DIGITS = { '0', '1', '2', '3', '4', '5', '6', '7', '8', '9', 'A', 'B', 'C', 'D',
            'E', 'F' };

    public static String encodeMD5(byte[] binaryData) {
        byte[] md5Bytes = calculateMd5(binaryData);
        int len = md5Bytes.length;
        char buf[] = new char[len * 2];
        for (int i = 0; i < len; i++) {
            buf[i * 2] = HEX_DIGITS[(md5Bytes[i] >>> 4) & 0x0f];
            buf[i * 2 + 1] = HEX_DIGITS[md5Bytes[i] & 0x0f];
        }
        return new String(buf);
    }

    public static byte[] calculateMd5(byte[] binaryData) {
        MessageDigest messageDigest = null;
        try {
            messageDigest = MessageDigest.getInstance("MD5");
        } catch (NoSuchAlgorithmException e) {
            throw new RuntimeException("MD5 algorithm not found.");
        }
        messageDigest.update(binaryData);
        return messageDigest.digest();
    }
}